Actually the theory still holds true, there's just better ways of
doing things, and materials can be overcome by superior engineering
or design that optimizes the materials. Built the same way, a copper
radiator will transfer much more heat than an aluminum one, but it
will weigh a ton. so the designer specifies much thinner walls, and
that helps both the conduction and the weight, but it becomes as
fragile as aluminum. Or the designer chooses aluminum and designs for
better airflow and uses the fins to brace the tubes so they can be
thinner. It's all compromises my friends. Look at the stuff they use
in aerospace and dream. Heat exchangers with exotic metals, swirl
tubes, super high surface area inside the tubes created by micro
crimping the tubes to make fins. If we used those radiators in our
cars they would be dinky--the size of an oil cooler, but they'd cost
more than our car, and our house. they can't even afford them for F1.
On Jan 30, 2007, at 12:40 PM, John W wrote:
> Really-
> In practical use it seems with my experience that Aluminum is a better
> conductor-
> I have a 2 row x 1" aluminum radiator that will run circles around any
> copper radiators I've used , including a custom
> 4 row I had made- Plus I have a hard time believing a Copper
> radiator is
> the same weight since I actually weighed mine and saved a ton of
> weight with
> approximately the same dimensions- Maybe Theory is not all its
> cracked up to
> be in certain real world applications?
>
> John W.
> Spitfire #892 DP
> 240z CP3
> ----- Original Message -----
> From: <chasgee@aol.com>
> To: <ryoung@navcomtech.com>; <chris@tr4-racing.de>;
> <fot@autox.team.net>
> Sent: Tuesday, January 30, 2007 2:15 PM
> Subject: Re: [Fot] Aluminum Radiators and Electrolysis
>
>
>> Oops, I stand corrected. I was thinking of silver. At least its
>> silver
>> in color!
>>
>>
>> -----Original Message-----
>> From: ryoung@navcomtech.com
>> To: chasgee@aol.com; chris@tr4-racing.de; fot@autox.team.net
>> Sent: Tue, 30 Jan 2007 1:55 PM
>> Subject: RE: [Fot] Aluminum Radiators and Electrolysis
>>
>>
>>
>>> Actually, aluminum is a better conductor.
>>
>> Not correct. For the same thickness, copper (and brass, which is
>> what
>> radiators use) are better conductors of heat (and electricity) than
>> aluminum.
>>
>>> I'm impressed that
>>> your copper radiator weighs the same as an aluminum one,
>>> especially since copper is heaver than steel. Must be really
>>> small in comparison.
>>
>> Or simply thinner than aluminum. Since brass is also stronger than
>> aluminum, not too hard to do.
>>
>> Randall
>>
>>
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